Rosette for electric wiring



May 27. 1924. 1,495,701y

C. D. MCLEAN ROSETTE FOR ELECTRIC WIRING Original Fi-ledAuz. 19. 1920 1 f 7 I I Y. lNvl-:N'roR Y a. M17 gain.

; By 'WTTORNEYS 'Z Patented May 27, 1924.

UNITED s'raris PATENT oFFlcE.

CHARLES D. MeLEAiv, or EERLIN, HAMPsrIIRi-l, Ass'rGNoR, RY DIRECT Ann `ivrEsnE ASSIGNMENTS, TQMECHANICAL a ELECTRICAL MANUFACTURING Co., INC.,

A CORPORATION or MAINE.

RosE'r'rE -Een ELECTRIC WrRiNG.

Application med Augis't' 19, 1920, serial No. 404,497. Renewed April 11, 1924.

To all 'wh-om t may concern# 5 l y Be it known that I, 1CHARLES D. MCLEN,

a citizen of the United States, residing at Berlin, in thecounty of Coos and State of 5 New Hampshire, have inventedcertain new.

and useful Improvements in Rosettes for Electric Wiring, of which the following is a specification.v Y i, j v

, The invention has .for its obj ect toprovide a simple and inexpensive construction'of wiring rosette adapted to besecuredtoa ceiling, wall or othenfastening, there .toj

form a juncture between the. house wiring ,j system and the wiring of adrop'j-light orlany other electrical apparatus adapted to be supplied therethrough.

TheV inventionYA also provides a.` means whereby rosettes constructed in accordance therewith maybe used in connection with any one of or any practicalY combination of the conventionaltypes ofl Wiring at present employed and when such universal usefof the device is utilized thermodification made l necessary by the occasion is4 affected Lby the Workman using thedevice and Whenmade such modification does not in any way aHect the outward appearance of the device to make the same unsightly. l

The device is made in twoy parts that it may bedisjoined, when` necessary, and is constructed and joined in such a manner as to obviate all damage vof fire and also lthe necessity of the using of a separate design of rosette for each system of wiring, thusmaterially reducing the cost of material and labor. i I Y l In its more detailed nature, the invention resides in those novel details'of construction and arrangement of parts, all of which will be first fully described in the following specifications, vpointed out in the appended claims and illustratef'ilY in the accompanying drawings, in which: f Y

Figure 1 is a perspective view of the invention in use in a concealed wire system, the parts being shown separated.-

Figure 2 is a plan view of a base member with two of the thinned rim portions knocked out-to allow for the insertion of terminals of the wires of an open cleated wire system, the latter being indicated in dot and dash lines, the dotted lines illustrating the manner in which the terminals of a metal moulding covered system may be inserted. v

Figure 3 is an inverted plan view of the removable cover half of the device.

Figure 1, is a detail section taken substantially on the line 4:-4 on Figure 2.

Figure 5 is a detail cross section of the bar se member and its removable cover half, the parts being separated.

Figure 6 is a detail perspective view .of gne of the retaining clips carried by the ase. f

.Figurer is ya similar view of one of'th cover plate carried clip members.

Figure 8 is a detail view illustrating the manner in which the thinned'i'im flange portions are knocked out and filed down, when the same is necessary.

In the drawings in which like numerals of reference indicate like parts in all the figures, 1 represents a base member, in the nature' of a cylindrical shell constructed of porcelain or other suitable material, including a centralrib portion 8 projectedk from the base plate 2 and which is broadened at its outer ends to accommodate 'a countersunk bore 4 adapted to receive screws 5 for fastening the device to a wall, ceiling or similar fastening.

The cylindrical base shell 1 is formed by an annular flange 6 projected from each side ofthe base plate, the shorter or Wall engaging portion of which fiscontinuous, while the one projecting from the opposite side, is recessed at 7,`the purpose of which willpresentlyappear. r

The flange 6 also Aincludes athin rim portion 8 projecting slightly beyond the plane of the said flange and the central rib 3 and adaptedto provide a seat for the cover or cap member 10.v The said cap member is in the nature .of a hollow cap having a flange 11 adapted to seatwithin the rim portionS and to bear on the top of the interrupted broad flange 6. The cap is centrally bored, as at 12, to allow for the passage of the wires of a drop light or other apparatus as shown in Figure 1. The said wires after entering the cap are made fast to the binding screws 13 of a pair of contact members 14 hereinafter again referred to.

For cooperatively connecting the base 105 member 1 to the cap member 10 so that such connection will present a positive and safe conduction of the electric current therethrough and also to form a firm but easily removable locking medium, I provide the base 1 with a pair of Jontact members 15 which also have a supplemental spring clip member 16 fastened thereto and adapted to exercise a tight frictional engagement upon the head portion of the cooperating` contact member 14 carried by the cover cap when turned to its operative position therebetween.

The contact members 15-16 are placed one at each side of the central partition rib 3, thereby rendering impossible the short circuiting of the wires entering the base through the apertures 9 or otherwise as hereafter explained.

The wires entering the base, from whatever system is in use, are fastened to the binding posts 17 of the contact members 1516.

By reference to Figures 2 and 3 and also 6 and 7, it will be seen that by placing the cap member 1() in the proper position with in the flange 8 of the base and turning as indicated by the arrows on the rst mentioned of the figures, it will be understood that the head portion of the cap carried contacts 14-14vwill come into position to be tightly held between the spring members 15-16, 15-16.

In Figure 1, I have shown the device as used in a concealed wire system but one of the main features of the invention resides in its applicability to any of the conventional types of wiring systems and in order to affect this result, I make the following provisions.

The dot and dash lines on Figure 2 illustrate the manner of induction of the wires of an open cleated wire system into the base member and the dotted lines illustrate the induction of those of a metal moulding covered system.

It is when these methods of wiring are to be accommodated that the cut out portions 7 come into use as will be n ow explained.

It will be seen by reference to Figures 1, 2 and 8 that the places at which the cut out portions 7 occur, leave a very thin wall portion 18 which normally remains as shown in Figure 1, but which may be knocked out in a manner illustrated in Figure 8 and the rough edges tiled smooth to present a smooth appearance from without in order to accommodate one wire at each side as indicated by arrows on Figure 2.

From the foregoing taken in connection with the accompanying claims, the/novel features will be readily apparent to those familiar with such appliances.

lVhat I claim is:

1. In a device of the character wherein is provided a base member and a cap with interlocking contacts for retaining the cap on the base; a base member comprising a bottom plate, a thin annular rim or shell. a transverse partition and a thick annular wall adjacent to the shell and having intervals for the passage of wires, said shell adapted to be broken out at said intervals. and said partition having holes for fasten-- ing devices, substantially as shown and described.

2. In a device of the character wherein is provided a base member and a cap with inf terlocking contacts for retaining the cap on the base; a base member comprising a bottom plate, a thin annular rim or shell. a transverse partition and a thick annular wall adjacent to the shell and having in tervals for the passage of wires, said shell adapted to be broken out at said intervals` said partition having holes for fastening devices, said shell projecting beyond said annular wall to embrace the cap.

3. In a device of the character wherein is provided a base member and a cap with interlocking contacts on the cap and base: a base member having an annular thick flange with wire spaces at intervals and havinga thin annular shell with portions overlying said spaces adapted to be broken out.

4. In a device of the character wherein is provided a base member and a cap with interlocking contacts on the cap and base; a base member having an annular thick flange with wire spaces at intervals and having a thin annular shell with portions overlying said spaces adapted to be broken out, said base portion including a transverse partition with holes for fastening devices, and said base member having holes through its bottom for the passage of wires, substantially as shown and described.

CHARLES D. ldcLEAN. 

